Machinery tor towguzng and grooving



UNTED STATES PATENT OFFICE.

ROBERT KITTLE, OF DANSVILLE, NEW YORK.

MACHINERY FOR TONGUING AND GROOVING.

Specification of Letters Patent No. 7,024, dated January 15, 1.850.

. State of New York, have invented sundry new and useful Improvements in Planing- Machines; and I do hereby declare the following to be a full and eXact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l, is a perspective view of a planing machine in which my improvements are introduced; Fig. 2, a transverse section thereof, in the line m, of Fig. l; and Fig. 3 a perspective view of a portion of the machine detached.

Similar letters indicate like parts in all the figures.

The planing cutter wheel M, made use o-f in the planing machine in which I introduce my improvements, is. what is called the Bramah cutter wheel, and may be construct` ed, arranged, and adjusted in any known or usual manner.

My first improvement consists in t-he method-hereinafter set forthof holding the plank firmly and securely upon the bed plate while it is being operated upon by the planing cutters. This is accomplished by means of the following described arrangement of parts: a. bearing ring J, (or circular plate) of such a size that it will pass freely within the planing cut-ters secured to the wheel M, is placed immediately below the cutter wheel, above the bed piece L; a semiannular bed plate lc, is secured to the bed piece L, on the right side of J, the inner periphery of which corresponds with the outer periphery of J. Set screws Z, Z, pass up through screw apertures in the elastic plate in., (Fig. 2,) secured to the under side of the bed piece L, and thence through apertures in L, up to the ring J, in which their extremities are secured in such a manner that they can be freely turned for the purpose of regulating the position of the ring.

The plank to be operated upon is passed into the machine over the way O, between the roller P, P, and thence between the ring J, and the bed plate 7c, to the rollers Q, Q, and R, R. The ring J, is drawn down upon the plank by means of the set screws Z, Z, so as to firmly hold it upon the bed plate is, while the planing cutters are operating upon itl immediately above the bed plate, and in close proximity to the periphery of the holding ring J. The holding ring J, also serves to prevent the ends of the plank from being injured during their passage under the cutter wheel, from the pair Iof feeding rollers P, P, to the rollers Q, Q.

My second improvement consists in the manner of arranging the tonguing and grooving cutters -in their respective cutter heads, in combination with the manner of operating them.

The grooving and tonguing cutter heads A, B, are located between the pairs of feeding rollers Q, Q, and R, R: the front endl of the cutter head A, rests upon the headF, of the vertical shaft G, to which it is secured by a crank pin; and near its rear end it is jointed to one end of the lever e; which lever (6,) passes under the loop cap z', rising from the plate E, and is jointed to a pin rising from said plate. The grooving cutters a, a, a, are'let into and secured in the head A, in such positions as to form the groove in t-he edge of a plank during a portion the forward movement of the cutter head; and the cutter c, is placed in the rear end of the head (A) in such a position that it will cut into and finish the groove during a portion of the reverse movement of the head. The cutters a, a, a, perform their office during that portion of the forward movement of A, prior to the levers (e) reaching a right angular position with the edge of the plank, when the cutters are thrown out by the further movement of the lever e.' the cutter c, performs its office of finishing the groove during that portion of the return movement of the head A, prior to the levers (e) reaching its central position at right angles with the machine, when it is thrown out of the groove by the further movement of the lever.

The front end of the cutter head B,'rests upon the head F', of the vertical shaft G, to which it is connected by a crank pin; and near rear end it is jointed to one end of the lever e, the opposite end of which is jointed to a fulcrum pin rising from the plate E', and which lever passes under and is guided in its movements by the loop cap z, rising from the plate E. The tonguing cutters b, b, b, are let into and secured in the head B, in such positions that they will form the tongue upon the edge of the plank during the same portion of'the forward movement of B that the grooving cutters a, a, 0;, are made to operate upon the groove during the forward movement of A, as above described; and the finishing outter (Z, is placed at the eXtreme rear end of the head B, in such a position that it will perform a finishingV operation upon the tongue during the same portion of the return movement of B, that the cutter c, is caused to operate upon the groove during the return movement of A, as above described.v The cutter wheel M, the series of feeding rollers7 and the vertical shafts G, G', may be connected together and driven by any usual and well known manner.

Vhat I Claim as my invention and desire 15 to secure by Letters Patent, is-

The placing the finishing grooving and tonguing cutters 0, d, in the same heads-A,

`at points between the primary groovng and tonguing cutters and the finishers substantially as above described, for the purpose of giving to the said cutters the movements and action herein set forth.

ROBERT KITTLE.

Witnesses:

Z. C. ROBBINS, R. WILCOX. 

